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connec t ion
Factoring Wind Chill
applies to people and animals and does not affect things
like water pipes or road surfaces.
“So if it’s 30°F outside, but the winds are less than 5 mph,
there is no wind chill,” Fiebrich said. “Also, if the wind chill
is 25°F, but the air temperature isn’t below 32°F, the roads
aren’t going to freeze.”
Wind chill maps are available on the Mesonet website. The
maps are titled Wind Chill/Heat Index and display wind chill
if it’s cold and windy, heat index if it’s hot and humid, or just
air temperature if neither of those conditions apply.
To view these maps, visit www.mesonet.org, click on weather
at the top of the page, and then click air temperature on
the side of the page. Three wind chill/heat index maps are
available. The first is wind chill/heat index. Also available are
today’s minimum and maximum wind chill/heat index maps.
Be sure to the read the “learn more” section below the map.
Volume 3 — Issue 1 — January 2012
www.mesonet.org
You just checked the weather, and it’s currently 30°F.
When you step outside, the wind hits your face, and it feels
a lot colder than 30°F. You just experienced wind chill. Wind
chill is an important factor to consider during the winter
months because it could quickly lead to frost bite.
The Oklahoma Mesonet uses the National Weather
Service’s equation for wind chill. The NWS model is based
on a human face model to estimate the heat loss from your
face caused by wind and temperature.
“It (wind chill) is important because the higher the wind
speed, the faster heat is carried away from the skin,”
said Chris Fiebrich, Associate Director for the Oklahoma
Mesonet. “Thus the faster your skin cools, the more prone
you are to frost bite.”
Wind chill is calculated when the temperature is below 50°F
and winds are greater than 5 mph. Also, wind chill only
Warning signs of frost bite
from the Center for Disease
Control and Prevention: At
the first signs of redness
or pain in any skin area,
get out of the cold or
protect any exposed skin—
frostbite may be beginning.
Any of the following signs
may indicate frostbite:
• a white or grayish-yellow
skin area
• skin that feels unusually
firm or waxy
• numbness
Note: A victim is often
unaware of frostbite until
someone else points it out
because the frozen tissues
are numb.
–by Stephanie Bowen

connec t ion
Factoring Wind Chill
applies to people and animals and does not affect things
like water pipes or road surfaces.
“So if it’s 30°F outside, but the winds are less than 5 mph,
there is no wind chill,” Fiebrich said. “Also, if the wind chill
is 25°F, but the air temperature isn’t below 32°F, the roads
aren’t going to freeze.”
Wind chill maps are available on the Mesonet website. The
maps are titled Wind Chill/Heat Index and display wind chill
if it’s cold and windy, heat index if it’s hot and humid, or just
air temperature if neither of those conditions apply.
To view these maps, visit www.mesonet.org, click on weather
at the top of the page, and then click air temperature on
the side of the page. Three wind chill/heat index maps are
available. The first is wind chill/heat index. Also available are
today’s minimum and maximum wind chill/heat index maps.
Be sure to the read the “learn more” section below the map.
Volume 3 — Issue 1 — January 2012
www.mesonet.org
You just checked the weather, and it’s currently 30°F.
When you step outside, the wind hits your face, and it feels
a lot colder than 30°F. You just experienced wind chill. Wind
chill is an important factor to consider during the winter
months because it could quickly lead to frost bite.
The Oklahoma Mesonet uses the National Weather
Service’s equation for wind chill. The NWS model is based
on a human face model to estimate the heat loss from your
face caused by wind and temperature.
“It (wind chill) is important because the higher the wind
speed, the faster heat is carried away from the skin,”
said Chris Fiebrich, Associate Director for the Oklahoma
Mesonet. “Thus the faster your skin cools, the more prone
you are to frost bite.”
Wind chill is calculated when the temperature is below 50°F
and winds are greater than 5 mph. Also, wind chill only
Warning signs of frost bite
from the Center for Disease
Control and Prevention: At
the first signs of redness
or pain in any skin area,
get out of the cold or
protect any exposed skin—
frostbite may be beginning.
Any of the following signs
may indicate frostbite:
• a white or grayish-yellow
skin area
• skin that feels unusually
firm or waxy
• numbness
Note: A victim is often
unaware of frostbite until
someone else points it out
because the frozen tissues
are numb.
–by Stephanie Bowen